Question

Homework 1- Merge Files: 1. Design a class named MergeFiles 1 Three file names are passed as command-line arguments to MergeFiles as follows: java MergeFiles filel file2 mergedFile II. MergeFiles reads names stored in files file and file2 III. Merges the two list of names into a single list IV. Sorts that single list V. Ignores repetitions VI. Writes the sorted, free-of-repetitions list to a new file named mergedFile.txt VII. The names in all three files are stored as one name per line NOTE: The design of MergeFiles class is very similar to the Replace Text class that was discussed during the lectures on Exception Handling and File 110. 2. Create file1.txt and file2.txt in the MergeFiles NetBeans project directory. Put at least five names in each of these files 3. In NetBeans, go to Run > Set Project Configuration > Customize... > Arguments. In the field in front of Arguments type the following: filel.txt file2.txt mergedFile.txt 4. Now if you run MergeFiles from within NetBeans, it will run with those three command line arguments 5. Run the program, and examine the resultant mergedFile.txt to ensure that the program is working properly 6. Delete throws Exception from main and try to run the program. You will receive an error. Is this error due an unchecked exception or checked exception? 7. There is a try block, but no catch or finally blocks in the code. The program, however, still works properly. Why is that? Program Logic f) Create an ArrayList object, names B) Open filel.txt for reading using File and Scanner h) Read the contents of filel.txt into the names object i) Open file2.txt for reading using File and Scanner i) Read the contents of file2.txt and add them to names k) Sort names by first converting it to an array and then applying the built-in Arrays.sort) method 0 Print the contents of the sorted array to mergedFile.txt using File and Print Writer m) Skip any duplicate names while printing n) The MergedFiles class can be invoked as follows: java MergeFiles filel.txt file2.txt mergedFile.txt

Answer 1

PLEASE GIVE IT A THUMBS UP

-/Desktop/CODE/A.java (CODE) - Sublime Text (UNREGISTERED) File Edit Selection Find View Goto Tools Project Preferences Help FOLD A.java X demo.c X demo.cpp * d.cpp X index.html import java.util.*; import java.lang.; import java.io.*; class MergeFiles { demo.py x main.js public static void removeDuplicates (Vector v) for(int i=0;i<v.size(); i++) for(int j=0; j<v.size(); j++) if(i!=j) if(v.elementAt(i).equals(v.elementAt(j))) v. removeElementAt(i); public static void main(String[] args) throws Exception { Vector<String> name = new Vector<String(); File f = new File(args[]+".txt"); BufferedReader br = new BufferedReader(new FileReader(f)); while(true) { String s = br.readLine(); if(s==null) break; name, add(s); H H br.close(); f = new File(args[1]+".txt"); br = new BufferedReader(new FileReader(f)); while(true){ String s = br.readLine(); if(s=null) break; name, add(s) : In HD M H H H br.close(); Collections. sort(name); removeDuplicates (name) :| f = new File(args[2]+". txt"); BufferedWriter bw = new BufferedWriter(new FileWriter(f)); for(int i=0;i<name.size(); i++) bw.write(name.elementAt(i)+"\n"); bw.close(); 43 } Line 36, Column 32 Tab Size: 4 Java

import java.util.*;
import java.lang.*;
import java.io.*;
class MergeFiles{

   public static void removeDuplicates(Vector v)
{
for(int i=0;i<v.size();i++)
for(int j=0;j<v.size();j++)
if(i!=j)
if(v.elementAt(i).equals(v.elementAt(j)))
v.removeElementAt(j);
}

   public static void main(String[] args) throws Exception {
       Vector<String> name = new Vector<String>();      
       File f = new File(args[0]+".txt");
       BufferedReader br = new BufferedReader(new FileReader(f));      
       while(true){
           String s = br.readLine();
           if(s==null)
               break;
           name.add(s);
       }
       br.close();
       f = new File(args[1]+".txt");
       br = new BufferedReader(new FileReader(f));      
       while(true){
           String s = br.readLine();
           if(s==null)
               break;
           name.add(s);
       }
       br.close();
       Collections.sort(name);
       removeDuplicates(name);
       f = new File(args[2]+".txt");
       BufferedWriter bw = new BufferedWriter(new FileWriter(f));      
       for(int i=0;i<name.size();i++)
           bw.write(name.elementAt(i)+"\n");
       bw.close();
   }
}

nikhil@nikhil-Vostro-15-3568:-/Desktop/CODE$ javac A.java nikhil@nikhil-Vostro-15-3568:-/Desktop/CODE$ java MergeFiles file1 file2 MergeFi le nikhil@nikhil-Vostro-15-3568:~/Desktop/CODES

Open # Merge File.txt -/Desktop/CODE Save = 0 layush himanshi hrithik meghu nikhil saksham sid srishti Plain Text Tab Width: 8 Ln 1, Col1 INS

Open file 1.txt -/Desktop/CODE Save nikhil saksham hrithik ayush meghu Plain Text Tab Width: 8 Ln 5, Col 6 INS

nikhil
saksham
hrithik
ayush
meghu

Open File 2.txt -/Desktop/CODE Save 3 00 srishti himanshi sid nikhil saksham Plain Text Tab Width: 8 Ln 5, Col 8 INS

srishti
himanshi
sid
nikhil
saksham